TECHNICAL MANUAL
Chapter 9 - User - Control Interface
NGSi 05÷15
22
ENGLISH
EN
The data in this manual are not binding and they can be modified by the manufacturer without notice. Reproduction of this manual is strictly prohibited
If the unit is switched off from a remote control position (by means of the onoff-onoff terminals), the keypad on the unit or a remote keypad,
operation in domestic hot water mode is unaffected. Once parameter H10 has been set as 1, the unit switches to domestic hot water mode as
priority as soon as it is powered up. The display on the unit shows the temperature reading of the probe inside the domestic hot water tank.
Once the domestic hot water cycle has been completed, the display again shows the water output probe temperature.
If the remote ON-OFF digital input (onoff onoff terminals) is open, with domestic hot water function enabled (H10=1 and H20=6), the
machine display instead shows “SAN”. Once the sanitary cycle is finished, the display returns to show the message “E00” indicating that the
remote ON-OFF contact is open.
During winter mode operation, defrosting always takes place on the user side and never on the domestic hot water tank.
9.13 Domestic hot water accumulation in hot mode
If the parameter H83=1, the machine utilizes the domestic hot water accumulation tank also for heating on the system side. In these
conditions, the relay that controls the domestic hot water valve is energized also during operation in hot mode and not only in domestic hot
water mode. During defrosting and in chiller mode the valve is de-energized. When H83=1 it is possible to enable the domestic hot water
Terminal board
of the
Terminal board
of the
Settings
H10=1
H20=6
Settings
H10=1
H20=0
H45=28
H54=128
SAN, SAN direction
of the terminal board
of the Minichiller
no. 3
Towards L1, N1, GND
of the terminal board
of the Minichiller
no. 3
Rated voltage
of the
230 V AC coil
COM, NO
Clean contact
for domestic hot
water call from the
digital input
Rated voltage
of the
230 V AC coil
COM, NO
Clean contact
for domestic hot
water call from the
digital input
3-way valve
side
Domestic hot water sensor
Domestic hot water tank side
Connection for valve with 3-point power supply only, system side
no. 1
no. 2
Minichiller
Minichiller
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